Entmoot was the name for a meeting of the Ents of Fangorn Forest, said to be a rare occasion in the later days of the Third Age. The Moot was held by tradition at a dell in the Forest known as Derndingle.[1]

Treebeard then summoned an Entmoot which, due to the slow thinking and speech of the Ents, lasted for days, between 30 February and 2 MarchT.A.3019.[2]

The long, deliberate discussion led to the decision that -- facing an inevitable slow extinction -- they would attack Isengard to avenge the damage Saruman's Orcs had done to their tree-herds. This so-called 'Last March of the Ents' was a significant event in the War of the Ring.[1]